All these discussions sound like people who don't know how cars work, but they do know how to use a wrench, screwdriver, etc, and they try to design new cars.

All these discussions sound like people who don't know how cars work, but they do know how to use a wrench, screwdriver, etc, and they try to design new cars. A "federated web app" is literally just a web app that uses OAuth. You can do "more federation" with OpenID or OpenID Connect. It seems "the fediverse" is intended for more of the same, but with specific data types (e.g. "social media data"), which does not seem scalable.